It is possible this game is from that tournament, which unfortunately, Zukertort died before finishing. I don't know much about it, but do ask if you have Gillam's <London (1887)> book in order to confirm the provenance of this game.

Here's a mention of the <London (1888)> tournament from BCM:

<No sooner was the handicap at Simpson's over, than public interest turned to that held at the British Chess Club, which, so far has been a great success. In the first class there are playing Messrs. Bird, Blackburne, Gattie, Gunsberg, Mortimer, Pollock, and Zukertort ; Jas. Mason also gave in his name, but retired before play begun. Mr. G. E. Wainwright (who tied with Mr. D. Y. Mills for 3rd and 4th prizes in the B.C.A. amateur championship tourney, 1887) aDd Mr. Sellon (who tied with Mr. Pollock for 5th prize in the Divan tournament, just completed) are also playing, together with other well-known members of the British, so that some good games may be expected. So far we have been treated to a series of surprises, and the results up to this point present a strange contrast in some respects to those shown in the Divan handicap ;
Zukertort seems to have recovered his old precision, and so far he has secured every game but one. Bird, despite a some what serious indisposition, has played very vigorously, and is only half a point behind Zukertort. Blackburne has not opened his score well, but his friends fully expect he will still be "well in" at the finish ; he defeated Bird in good style, but he has lost to Ingoldsby, and a game with Gattie is unfinished, Blackburne claiming a draw on a point of law, which claim Gattie opposes, and the committee will have to settle the matter. Gunsberg has made a very bad start indeed, as he has lost to Zukertort and drawn with
Mortimer. Pollock also has not shown to much advantage as yet ; he made a brilliant start at first by defeating Gunsberg in a most elegant manner, but since then he has lost three games at odds. Mortimer is showing greater steadiness, and although he has lost to Zukertort and drawn with Gunsberg, he has a good score. Since writing the foregoing, I have to record that owing to Mr. Zukertort's sad death, a change has taken place in the chances of competitors, whether the committee cancel all his games or allow those played to stand. The leading scorers now are, Mr. Zukertort, one point down ; Wainwright, two points down ; and Bird, two and a half points down.>

Despite having died before the finish, Zukertort shared 3-6th place in the Handicap Tournament with 10 points.

<

Blackburne won 11 ) First and Second
Gunsberg " 11 ) Prizes ex-æquo.
Bird " 10 ) Third, Fourth
Wainwright " 10 ) and Fifth
Zukertort " 10 ) Prizes ex-æquo.
Pollock " 8½ ) Sixth Prize
Gattie " 8½ ) ex-æquo.
Mortimer " 6½
Michael " 5½
Jetley " 5½
Ingoldsby " 4½
Wyman " 4
Alderson " 1
Hirschfeld " 0

> from CCC v3 N7-9 (Aug 18, 1888) p53.

(ex-æquo = shared; maybe from the idea of being as level as water?)

This game should probably have the PGN headers corrected.

Yes, I was aware of that, but your statement is clearer and so better than my lead-in:

< there was another tournament in London summer 1888, just before the Bradford BCA Intl (1888).

It is possible this game is from that tournament, which unfortunately, Zukertort died before finishing.>

Zukertort was dead before the BCA 1888 tournament at Bradford was started (though it did have Masters and a Handicap tournaments, among others). So he never played in a BCA 1888 tournament, or did he? (See below)

Zukertort's last tournament was the British Chess Club Handicap tournament, held in the Divan in London.

I think there is a typo-mistake in this statement <The only game that Zukertort lost at the Bradford B.C.A event of 1888 was to Wainwright.>.

Do you mean BCC (British Chess Club)?

I didn't catch this typo(?) earlier, as I read it quickly and interpreted as referring to the Divan tournament.

So, to be clear, the lost to Wainwright was at the BCC Handicap tournament at the Divan, London (1888)?

Thanks, I was wondering about this. Zukertort had a bye for that day, and just came down to "hang out".

BTW- BCM does mention a BCA Tournament in London for 1887:

<The Third Annual Congress of the British Chess Association, began on Tuesday, 29th November, in the rooms of the British Chess Club, 37, King Street, Covent Garden. The proceedings included a National Master Tournament, an Amateur Championship Tournament, and Tennyson and Ruskin Tournaments. The Congress closed officially, on Monday, 12th December, but, as a matter of fact, play in the tie-match between Burn and Gunsberg for first and second places in the Master Tournament, did not cease till Friday, 16th December; whilst the play in the other contests was prolonged even to a later date.

The players who took part in the Master Tournament, were Mr. Amos Burn, of Liverpool; and Messrs. H. E. Bird, J. H. Blackburne, A. Guest, I. Gunsberg, F. Lee, J. Mason, J. Mortimer, W. H. K. Pollock, and J. H. Zukertort, of London. Originally, the Rev. A. B. Skipworth's name appeared in the list in place of Mr. Guest, but at the last moment the rev. gentleman declined to play, as he objected to the Tournament being held in a private club; 'and to make up the number to 10 and so keep it a one-game fight, Mr. Guest volunteered to play. On the first day the players did not sit down till three o'clock, but after that, two o'clock was the hour, except on Saturday, 3rd December, when play started at noon, to give time for the banquet to be held in the evening. As our space is limited it is impossible for us to go through the play day by day, and we must content ourselves with a passing glance at the salient points in the play of the various masters.

The first and second prizes were tied for by Mr. A. Burn and Mr. I. Gunsberg, and as after five games had been played to settle the tie it was still unsolved, their position in the present Tournament must be considered absolutely equal. >

BCM v8 p29

And on p40 is a description of this game:

<Blackburne played a French against Zukertort, and won a Pawn on the 10th move, R's and Q's were changed oft on the 19th and 20th moves, and in the end game Blackburne got his P up to Q 7, and Zukertort resigned on the 41st move. >